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Periodic Classification of Elements — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10SciencePeriodic Classification of Elements1 Mark
MCQ
Which of the following element would lose an electron easily?
  • A
    $\ce{Mg}.$
  • B
    $\ce{Na}.$
  • ✓
    $\ce{K.}$
  • D
    $\ce{Ca}.$
✓

Answer

Correct option: C.
$\ce{K.}$
$\ce{K}$ would lose an electron easily as it is a group $1$ metal whose atomic number is greater than that of $\ce{Na},$ which also belongs to group $1. \ce{Mg}$ and $\ce{Ca}$ are group $2$ metals and the tendency to lose electrons decreases on moving from left to right in a period of periodic table.

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